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UniProtKB/Swiss-Prot P21802: Variant p.Ala172Phe

Fibroblast growth factor receptor 2
Gene: FGFR2
Variant information

Variant position:  172
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Alanine (A) to Phenylalanine (F) at position 172 (A172F, p.Ala172Phe).
Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.

Physico-chemical properties:  Change from small size and hydrophobic (A) to large size and aromatic (F)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -2
The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Involvement in disease:  Pfeiffer syndrome (PS) [MIM:101600]: A syndrome characterized by the association of craniosynostosis, broad and deviated thumbs and big toes, and partial syndactyly of the fingers and toes. Three subtypes are known: mild autosomal dominant form (type 1); cloverleaf skull, elbow ankylosis, early death, sporadic (type 2); craniosynostosis, early demise, sporadic (type 3). {ECO:0000269|PubMed:10394936, ECO:0000269|PubMed:10945669, ECO:0000269|PubMed:11173845, ECO:0000269|PubMed:11781872, ECO:0000269|PubMed:16844695, ECO:0000269|PubMed:17803937, ECO:0000269|PubMed:7719333, ECO:0000269|PubMed:7719345, ECO:0000269|PubMed:8644708, ECO:0000269|PubMed:9002682, ECO:0000269|PubMed:9150725, ECO:0000269|PubMed:9693549, ECO:0000269|PubMed:9719378}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In PS; requires 2 nucleotide substitutions.
Any additional useful information about the variant.



Sequence information

Variant position:  172
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  821
The length of the canonical sequence.

Location on the sequence:   RAPYWTNTEKMEKRLHAVPA  A NTVKFRCPAGGNPMPTMRWL
The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.

Residue conservation: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         RAPYWTNTEKMEKRLHAVPAANTVKFRCPAGGNPMPTMRWL

Mouse                         RAPYWTNTEKMEKRLHACPAANTVKFRCPAGGNPTSTMRWL

Chicken                       RAPYWTHTDKMEKRLHAVPAANTVKFRCPAMGNPTPTMRWL

Xenopus laevis                RAPYWTNTEKMEKKLHAVSAANTVKLRCPARE-PHPSNEWL

Zebrafish                     RLPYWTFPEKMEKKLHAVPAANTVKFRCAAAGNPKPKMRWL

Drosophila                    GPPVF---RKELKRLQHSLSGNTVNLACPVYG--KANITWT

Sequence annotation in neighborhood:  
The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.

TypePositionsDescription
Chain 22 – 821 Fibroblast growth factor receptor 2
Topological domain 22 – 377 Extracellular
Domain 154 – 247 Ig-like C2-type 2
Region 161 – 178 Heparin-binding


Literature citations

Genomic screening of fibroblast growth-factor receptor 2 reveals a wide spectrum of mutations in patients with syndromic craniosynostosis.
Kan S.-H.; Elanko N.; Johnson D.; Cornejo-Roldan L.R.; Cook J.; Reich E.W.; Tomkins S.; Verloes A.; Twigg S.R.F.; Rannan-Eliya S.; McDonald-McGinn D.M.; Zackai E.H.; Wall S.A.; Muenke M.; Wilkie A.O.M.;
Am. J. Hum. Genet. 70:472-486(2002)
Cited for: VARIANTS CS CYS-105; PRO-267; VAL-276; CYS-281; PRO-289; ARG-338; HIS-340; PHE-342; TRP-342; CYS-347; CYS-354; HIS-549 AND GLY-678; VARIANTS PS PHE-172; 252-PHE-SER-253; CYS-290; CYS-340; PRO-341; ARG-342; SER-342; CYS-375; GLY-565; ARG-641 AND GLU-663; VARIANTS APRS TRP-252 AND ARG-253; VARIANTS CS/PS PHE-278 AND TYR-342; VARIANT CRANIOSYNOSTOSIS ASN-659; VARIANTS THR-186 AND SER-315;

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.